29820645018 has 32 divisors (see below), whose sum is σ = 67257184320. Its totient is φ = 9791852400.

The previous prime is 29820645017. The next prime is 29820645037. The reversal of 29820645018 is 81054602892.

29820645018 is a `hidden beast` number, since 2 + 9 + 82 + 0 + 64 + 501 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (29820645017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4117533 + ... + 4124768.

It is an arithmetic number, because the mean of its divisors is an integer number (2101787010).

Almost surely, 2^29820645018 is an apocalyptic number.

29820645018 is an abundant number, since it is smaller than the sum of its proper divisors (37436539302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29820645018 is a wasteful number, since it uses less digits than its factorization.

29820645018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8242379 (or 8242373 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 29820645018 in words is "twenty-nine billion, eight hundred twenty million, six hundred forty-five thousand, eighteen".